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Butoxors [25]
2 years ago
5

Pls help me answer this | | V

Mathematics
1 answer:
svp [43]2 years ago
7 0

Answer:

x=-6

Step-by-step explanation:

7x-12-2x=18

+12 both sides

7x-2x=30

7x-2x=-5x

-5x=30

divided both sides by -5

x=-6

hope this helps

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riadik2000 [5.3K]
X=y+3
<span>-5x-4y=<span>30
-------------------
Substitute y + 3 for x in </span></span>-5x-4y=30
<span><span>-5<span>(y+3)-</span></span>4y</span>=<span>30
</span>-9y-15=<span>30
</span>----------------------------
Add 15 to each side
<span><span>-9y-15</span>+15</span>=<span>30+<span>15
-9y = 45
</span></span>-----------------------------------
Divide each side by -9
-9y ÷ -9 = 45 ÷ -9
y = -5
Now we solve for x
====================================================================
Substitute -5 for y in x = y + 3
x=-<span><span>5</span>+<span>3
</span></span>x = -2
----------------------
(-2,-5) is your answer


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